Hi rikys2,
I suspect the reason you are not getting many answers to your questions here is your weight (87 Kg./
192 lbs) and your 7.7 m2 Hellcat sail.
Nearly everyone your weight, in 7-12 knots, would probably choose a 9.0-10.0 m2 or larger sail.
Your 7.7 m2 Hellcat might begin to give you reasonable power at 13-15 knots of wind.
None of the boards you have asked about are going to give you any sort of "performance" until you
choose a larger rig that will be powered up.
Roger